Powder Interlayer Bonding of Nickel-Based Superalloys with Dissimilar Chemistries

Area of Science:

• Materials Science
• Mechanical Engineering
• Aerospace Engineering

Background:

• Aerospace components, particularly in jet turbine engines, require robust repair methods due to high stress and temperature environments.
• Nickel-based superalloys are critical for gas turbine engines but pose challenges for conventional repair techniques like friction welding.
• Powder interlayer bonding (PIB) is an emerging joining technology with potential for repairing advanced superalloys.

Purpose of the Study:

• To investigate the efficacy of Powder Interlayer Bonding (PIB) for joining dissimilar nickel-based superalloys.
• To evaluate the feasibility of PIB as an alternative repair technology for aerospace components.

Main Methods:

• Utilized Powder Interlayer Bonding (PIB) with a powder interlayer, localized temperature gradient, and compressive force.
• Applied PIB to join dissimilar nickel-based superalloys.
• Examined the resulting bonds for characteristics such as porosity and processing time.

Main Results:

• Achieved successful joining of dissimilar nickel-based superalloys using PIB.
• Observed bonds with very little porosity.
• Demonstrated that the process requires only a short processing time.

Conclusions:

• Powder Interlayer Bonding (PIB) shows significant potential as an effective repair technology for nickel-based superalloys in the aerospace industry.
• The method's ability to join dissimilar alloys with minimal defects and short processing times makes it a promising alternative to conventional methods.